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shader pack

R-T-SMinecraft shader pack

What is the R-T-S Shader? It is a shader pack that attempts to simulate complex global illumination techniques. Unlike traditional shaders that rely on simple rasterization, R-T-S calculates light paths more realistically within the game engine.

client only
Latest version
1.0.4
Minecraft
no version declared
Licence
Apache-2.0
Downloads
850
Updated
2 mo ago
Available on
Modrinth

Download

From R-T-S’s own host. Nothing is re-hosted here.

1.0.4release6 Jul 2026

R-T-S_1.0.4.zip · 0.0 MB · for 1.20.1, 26.2

Download latest
47ee96e05b2c
Older versions6
  • 1.0.327 Jun 20261.20.1, 26.20.0 MB80 downloads824dab356f9fGet
  • 1.0.221 Jun 20261.20.1, 26.20.0 MB130 downloadsabbce1d708ecGet
  • 1.0.120 Jun 20261.20.1, 26.20.0 MB73 downloads932959d9836fGet
  • 1.0.020 Jun 20261.20.1, 26.20.0 MB20 downloads8046979d0861Get
  • 0.1.118 Jun 20261.20.1, 26.20.0 MB15 downloadsd0edc4a1cf5fGet
  • R-T-S16 Jun 20261.20.1, 26.20.0 MB24 downloads2c61c933cc0cGet

Frequently asked

Do I need to install R-T-S on the client or the server?

The client only. There is nothing to install on the server side. That is the author's declared design, not a guarantee for every server: one running anti-cheat or missing a counterpart mod can still object.

What licence is R-T-S under?

Apache-2.0, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install R-T-S?

You need a shader loader first: Iris (with Sodium) or OptiFine. Put the downloaded file in your shaderpacks folder and select it in the video settings shader screen. The shader loader, not the pack, decides which Minecraft versions work.

Where do I download R-T-S safely?

From the author's own page on Modrinth, which is where the data here is synced from. MCReference never mirrors, re-hosts or repackages a file: every download button points at the original source, so you get exactly what the author published.

Which Minecraft versions does R-T-S work on?

The author has not declared a supported version in the metadata we sync, so there is nothing here we can state as fact. Check the project's own page before installing it, and treat an old shader pack with no declared version as untested on modern Minecraft.

Last checked 2 mo ago against Modrinth. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Not indexed yet. Score 54 against a threshold of 55. The page still exists and is still linked; it simply carries noindex until we hold more.

Is this information wrong or missing something? .